Head-shaping machine.



" G. GLOVBR 6: C. HOLT; HEAD SHAPING MACHINE. I

APPLICATION FILE]; rmaus, 1912.

1,027,383. V PatentedMay2Ll9l2.

oLUMBIA PLANUGRAEH CO..WA I

PATENT QFFICE.

QHABIJES tc-YER AND antral-u nuu m im oRs BY MESNE s IeN E ss to run mamma ,IIAEDWABE R OR T OF E BRITAIN, conunc'rrou'r, n ,oonronn'rro-n or co mnorrcur.

HEAD-SHAPING MACHINE.

p q fiset er P e te .let nt Patented May 21, 1912.

Original application filed March 31,1910, Serial 1510, 552,505. Divided and this application filed February 5,

1 2.- .s ia; a mas- ;description. v

Qur inventionrelates to an improved means for forming heads on bolts and other generally similar metallic devices and this application is a division from our former application Serial No. 552,505 filed March The present case relates particularly to certain structural details by which the proper cross-sectional shape to the head is given.

Inthe drawings: Figure 1 is a view of certain parts of our improved machine, such parts being shown in section; Fig. 2 is a similar view partly broken away, the parts being shown in a different position; Fig.

is a similar view the parts being shown in still another position; Fig. 4 is'a relatively enlarged end elevation partly in section of the shaping die; Fig. 5 is a central longitudinal section of the parts shown in Fig.

4:. Fig. 6 is a side and end elevation of a blank; Fig. 7 is a side and end elevation of a blank with an unfinished head; Fig. 8 is a side and end elevation of a blank having a finished head thereon of one of the shapes capable of being formedby the use of our improved shaper.

The main frame and associated parts of the machine proper are such as are embodied in the usual so-called heading machine and hence require no special showing or description.

1 represents a holder suitably constructed to hold'a blank, or a series of blanks, as indicated at 2-2. Thisiblank is usually formed of wire and it is upon the end of this wire that the head is to be formed and shaped.

3 represents a swaging die which is mounted upon a reciprocating carrier 4 which is power driven toward and from the holder 1. The swaging die 3 has a cavity in its front face which is arranged to line of awe 7 .7. between the sleeve 6. and the outer ends of the jaws 77. These toggle connections are up with the exposed end of the blank 2 which is to be headed. The aforesaid cavity is of generally cylindrical form and is enlarged at its outer end so as to form a flange at the base of its head such as shown in Fig. 7. The swagi-ng die 3 is mounted in a head 5 which is mounted at thefront of the carrier 4 so that it may be shifted transversely, suitable means (not shown) being provided for shifting said head 5 so as to move the swaging die 13 into and out of line with the blank 2.' The head 5 also, carries a head shaping mechanism, or what we may term the shaping die, which gives to the head the desired cross-sectional outline. The preferred construction of said shaping die enlarged is shown in Figs. 4 andq5 and it will be seen to comprise an external sleeve 6 having slidably inounted therein a plurality 8 8 are toggles arranged such that when the jaws 7 are projected as shown in Fig. 5 their outer ends will stand apartto the maximum degree. When however, these jaws are pushed back into the sleeve as shown in Fig. 3 the toggles will move said jaws toward each other so as to compress and shape anything that may be interposed between them. 9 is a spring representing one convenient means for projecting said jaws. 10-10 arestop pins to limit the forward movement of the jaws. 11-11 are springs which constitute one convenient means for moving the outer ends of the jaws 7 apart when said jaws are projected by spring 9. The movement of the carrier head 5 is such that the shaping die may be brought into positionin front of the blank 2, this positioning of the shaping die being alternate with that of'the swaging die 3. V

In operation the blank 2 to be formed is moved to and held in the position shown in Fig. 1. The swaging die 3 is shown in that figure in line with said blank. The carrier .4 is now advanced so as to cause said'swaging die 3 to swage the exposed end of the blank 2 and form thereon ahead, for example such as shown in Fig. 7 The carrier On the next forward excursion of the carrier 4 the shaping die is moved over the head which is formed upon the blank end as the die advances the jaws 7 will be checked when they encounter the flange of the said head, whereupon the continued advance of the head 5 with the sleeve 6 will cause the jaws 7'to be moved toward each other and so as to contract upon sides of the head and transferm it to the shape for which the jaws are designed, for example the shape shown in Fig. 8 in which it will be seen there are a plurality of flat side walls meeting at sharp angles. Inasmuch as the jaws encounter the metal at the middle or center line of each of the jaws, it is obvious that the metal of the head will be caused to flow in both directions from said jaw centers, or toward the corners so as to fill out properly said corners and thereby make an angular 'head which will efiectively receive a suitable tool such as a wrench. The final position of the shaping members and associated parts is shown in Fig. 3. When the head is thus finished the carrier 4 is retracted and the finished article is discharged. Thereafter, the aforesaid cycle of operation is repeated. Since we have shown no cutter for clipping off the finished blanks as they are successively headed and shaped, we have shown herein a series of blanks already cut to proper lengths, although obviously that length may be varied at will, and said blanks may be cut off either before or after the heads are formed by the use of any suitable cutting off mechanism.

We have shown only one design for the finished head, but it should be understood that this design may be modified in a variety of ways.

What we claim is:

1. In a machine for producing polygonal heads on rods, a shaping die comprising an external sleeve element and a plurality of internal shaping elements movable both radially and longitudinally within the outer sleeve element, and each of said internal elements having at its outer end an inner single fiat shaping face, all of said internal elements coacting to produce said polygonal CHARLES GLOVER. CHARLES HOLT.

Witnesses:

C. A. SEELYE, S. C. MURPHEY.

Copies of this patent may .be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. G. 

